US Bridges

Fort Clatsop Road over Estuary

Good

Clatsop County, Oregon · On Oregon SR 30 Follow S · Structure no. 9420001P0000000

Built
2007
18 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
400
2019 count
Owner
Federal
National Park Service

About this bridge

Fort Clatsop Road over Estuary is a prestressed concrete tee beam carrying Fort Clatsop Road over Estuary in Clatsop County, Oregon. It was built in 2007, so it is 18 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 400 vehicles a day, projected to reach 480 by 2039. The structure is 48 ft (14.6 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesFort Clatsop Road
CrossesEstuary
LocationOn Oregon SR 30 Follow S
RouteFederal Lands Road 0
CountyClatsop County
StateOregon
Coordinates46.12869, -123.87839
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating46 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length48 ft (14.6 m)
Longest span46 ft (14 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2019)
Projected traffic480 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$45,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fort Clatsop Road over Estuary built?

It was built in 2007, making it 18 years old in 2025.

What condition is Fort Clatsop Road over Estuary in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Fort Clatsop Road over Estuary carry?

About 400 vehicles per day (2019 count).

How long is Fort Clatsop Road over Estuary?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14 m) and a deck 34 ft wide.

Who owns Fort Clatsop Road over Estuary?

It is owned by the National Park Service.